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C. O. WHITMAN and W. M. WHEELER
THE UNIVERSITY OF CHICAGO
GINN & COMPANY, PUBLISHERS
C6e atbraaettm fJrces
By GINN & COMPANY
ALL RIGHTS RESERVED
CONTENTS OF VOL. II.
No. i. — July, 1898.
I. Ethan Allen Andrews.
Ft lose Activity in Metazoan Eggs I- 1 3
II. Charles B. Wilson.
Activities of Mesenchyme in Certain Larvae J5-23
III. O. P. Hay.
Observations on the Genus of Fossil Fishes
called by Professor Cope, Portheus, by
Dr. Leidy, Xiphactinus 25—54
No. 2. — October, 1898.
I. Henry Leslie Osborn.
Observations on the Anatomy of a Species of
Platyaspis found Parasitic on the Uni-
onidae of Lake Chautauqua 55-67
II. Agnes M. Claypole, Ph.D.
The Embryology of the Apterygota . . . 69-76
III. Wm. E. Ritter.
A Few Facts Concerning the Relationships
and Reproduction of Some Bering Sea
Tunicates 77-8 1
IV. Edward Phelps Allis, Jr.
The Homologies of the Occipital and First
Spinal Nerves of Amia and Teleosts . . 83-97
No. 3. — December, 1898.
I. George William Hunter, Jr.
Notes on the Finer Structure of the Nervous
System of Cynthia Partita (Verrill) . . 99-115
II. Ulric Dahlgren.
The Maxillary and Mandibular Breathing
Valves of Teleost Fishes 1 17-124
III. Florence Peebles.
The Effect of Temperature on the Regener-
ation of Hydra 125-128
IV. Katharine Foot and Ella Church Strobell.
Further Notes on the Egg of Allolobophora
No. 4. — February, 1899.
I. M. A. Willcox, Ph.D.
Notes on the Occipital Region of the Trout,
Trutta Fario 15 1— 1 54
II. C. H. Turner.
Notes on the Mushroom Bodies of the Inver-
tebrates. A Preliminary Paper on the
Comparative Study of the Arthropod and
Annelid Brain 155-160
III. Gustav Eisen, Ph.D.
Notes on North-American Earthworms of
the Genus Diplocardia 161-172
IV. Maurice A. Bigelow.
Notes on the First Cleavage of Lepas . . . 173-177
V. Charles A. Kofoid.
On the Specific Identity of Cotylaspis In-
signis Leidy and Platyaspis Anodontae
VI. C. E. McClung.
A Peculiar Nuclear Element in the Male
Reproductive Cells of Insects . . . . 187-197
No. 5. — June, 1899.
I. C. H. Turner.
A Male Erpetocypris Barbatus Forbes . . 199-202
II. B. F. Kingsbury.
The Reducing Divisions in the Spermato-
genesis of Desmognatkus Fusca .... 203-209
III. Michael F. Guyer.
Ovarian Structure in an Abnormal Pigeon . 211-224
IV. Charles W. Hargitt.
Some Interesting Egg Monstrosities . . . 225—229
V. E. C. Case.
A Redescription of Pariotichus Incisivus Cope 231—245
VI. Howard Ayers.
On the Pithecoid Type of Ear in Man . . 247—250
No. 6. — September, 1899.
I. J. Playfair McMurrich.
Contributions on the Morphology of the Acti-
nozoa. V. The Mesenterial Filaments in
Zoanthus Sociatus (Ellis) 251-273
II. Minnie Marie Enteman.
The Unpaired Ectodermal Structures of the
III. Garry de Nord Hough, M.D.
Synopsis of the Calliphorinae of the United
IV. Frank W. Pickel.
The Accessory Bladders of the Testudinata . 291-302